What is VOPO in tennis betting?

VOPO (Value Over Pinnacle Odds) is the difference between Tennis Glicko's internal win probability (average of Glicko-2 and Elo models) and the implied probability from Pinnacle's odds. A positive VOPO means the market is undervaluing a player.

What is Green EV in tennis betting?

Green EV is Tennis Glicko's high-conviction value signal. It triggers when VOPO exceeds 12% AND the internal win probability is above 50% — indicating the market is significantly mispricing a player.

How accurate is Tennis Glicko?

Tennis Glicko has 72.8% predictive accuracy over the last 30 days, with a Brier Score of 0.1775 — a standard probabilistic calibration metric used in forecasting.

Why use Glicko-2 instead of ATP rankings for tennis predictions?

ATP rankings are a lagging indicator — they ignore surface specialization, injury returns, scheduling fatigue, and form swings. Glicko-2 updates after every match, adjusts for opponent quality, and models rating uncertainty, making it significantly more accurate for predicting match outcomes.

Rankings

Sonay Kartal

WOMENInactive

Age24

BirthplaceSidcup

Height1.63m

Weight—

Best HandRight

Backhand—

Recent Form

Win Rate:63%

Fatigue:0/100

Inactive:135 Days

Overall

Glicko-22.047

#28RD 69

Elo2.096

#33

Hard

Glicko-22.037

#30

Elo1.952

#26

Clay

Glicko-21.776

#308

Elo1.649

#361

Grass

Glicko-21.726

#43

Elo1.662

#30

Surface Record

HardClayGrass

20267-5——

20258-85-45-4

20245-0—2-1

2023——0-3

2022——0-2

Recent Matches

Elena RybakinaBNP Paribas Open - Indian Wells2026-03-11Hard6-4 4-3 ret.

Madison KeysBNP Paribas Open - Indian Wells2026-03-09Hard2-6 6-2 6-3

Emma NavarroBNP Paribas Open - Indian Wells2026-03-07Hard6-1 3-6 7-6(2)

Lanlana TararudeeBNP Paribas Open - Indian Wells2026-03-05Hard6-4 6-4

Aliaksandra SasnovichDubai Duty Free Championships - Dubai2026-02-14Hard6-4 6-3

Storm HunterDubai Duty Free Championships - Dubai2026-02-13Hard6-4 6-1

Magda LinetteQatar TotalEnergies Open - Doha2026-02-08Hard6-4 3-6 6-3

Kimberly BirrellQatar TotalEnergies Open - Doha2026-02-07Hard7-5 6-3

Simona WaltertQatar TotalEnergies Open - Doha2026-02-06Hard7-5 2-6 6-4

Sara BejlekMubadala Abu Dhabi Open - Abu Dhabi2026-02-05Hard6-0 6-2

Renata ZarazuaMubadala Abu Dhabi Open - Abu Dhabi2026-02-04Hard6-0 6-3

Cristina BucsaMubadala Abu Dhabi Open - Abu Dhabi2026-02-02Hard6-3 7-6(8)

Aliaksandra SasnovichMubadala Abu Dhabi Open - Abu Dhabi2026-02-01Hard6-2 6-4

Yuliia StarodubtsevaMubadala Abu Dhabi Open - Abu Dhabi2026-01-31Hard6-4 6-0

Anna KalinskayaAustralian Open - Melbourne2026-01-20Hard7-6(3) 6-1

Elina SvitolinaASB Classic - Auckland2026-01-09Hard6-4 6-7(2) 7-6(5)

Ella SeidelASB Classic - Auckland2026-01-08Hard6-3 6-1

Janice TjenASB Classic - Auckland2026-01-06Hard6-1 6-7(4) 6-3

Anhelina KalininaOpen BLS de Limoges - Limoges2025-12-10I.Hard7-6(4) 1-6 6-1

Jessica PieriOpen BLS de Limoges - Limoges2025-12-08I.Hard6-1 6-0

Linda NoskovaChina Open - Beijing2025-10-03Hard6-3 6-4

Mirra AndreevaChina Open - Beijing2025-10-01Hard7-5 2-6 7-5

Maya JointChina Open - Beijing2025-09-29Hard6-3 6-2

Daria KasatkinaChina Open - Beijing2025-09-27Hard6-3 6-0

Alycia ParksChina Open - Beijing2025-09-25Hard6-3 6-2

Emma NavarroBillie Jean King Cup, Finals2025-09-20I.Hard3-6 6-4 6-3

Ena ShibaharaBillie Jean King Cup, Finals2025-09-18I.Hard6-3 7-6(4)

Beatriz Haddad MaiaU.S. Open - New York2025-08-26Hard6-3 1-6 6-1

Solana SierraTennis in the Land - Cleveland2025-08-17Hard4-6 6-4 7-6(2)

Caroline GarciaCincinnati Open - Cincinnati2025-08-08Hard5-7 6-4 6-3

Anastasia PavlyuchenkovaWimbledon - London2025-07-06Grass7-6(3) 6-4

Diane ParryWimbledon - London2025-07-04Grass6-4 6-2

Viktoriya TomovaWimbledon - London2025-07-02Grass6-2 6-2

Jelena OstapenkoWimbledon - London2025-06-30Grass7-5 2-6 6-2

Jelena OstapenkoRothesay International - Eastbourne2025-06-24Grass6-3 7-6(2)

Katie BoulterRothesay Open - Nottingham2025-06-19Grass6-4 1-6 7-5

Leolia JeanjeanRothesay Open - Nottingham2025-06-17Grass6-3 6-4

Amanda AnisimovaLTA London Championships - London2025-06-11Grass6-1 6-3

Daria KasatkinaLTA London Championships - London2025-06-09Grass6-1 3-6 6-3

Marie BouzkovaFrench Open - Paris2025-05-29Clay6-1 6-4

Erika AndreevaFrench Open - Paris2025-05-27Clay6-0 6-2

Elsa JacquemotTrophee Clarins - Paris2025-05-14Clay6-4 ret.

Aoi ItoTrophee Clarins - Paris2025-05-12Clay6-2 3-6 6-3

Linda NoskovaInternazionali BNL d'Italia - Rome2025-05-09Clay6-4 6-2

Kimberly BirrellInternazionali BNL d'Italia - Rome2025-05-06Clay4-6 6-3 6-4

Elina SvitolinaMutua Madrid Open - Madrid2025-04-25Clay6-3 6-1

Jaqueline CristianMutua Madrid Open - Madrid2025-04-23Clay6-2 7-5

Varvara GrachevaOpen Capfinances Rouen Metropole - Rouen2025-04-15Clay6-3 6-2

Eva VedderBillie Jean King Cup, Qualifiers, Group F2025-04-12Clay6-4 4-6 6-1

Taylor TownsendMiami Open - Miami2025-03-17Hard4-6 7-6(2) 7-5

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